Spark plug



1,623,468 Ann! 51927' l..4 s. ELLETT t SPARK PLUG Filed March 12. 1925 2 Sheets-Sheet 2 zal? a? l 33 2.9 I l 30 INVENTDR ATTORNEY Patented Apr. 5, 1927.

c i s s LUTHER S. ELLETT, OF MILBURN, OKLAHOMA.

SPARK PLUG. i

Application filed March 12, 19215. Serial No. 15,9652.

the motor, and one wherein the various parts can be easily cleaned as the occasion may require. n

Another object of theA invention resides inl the provision of a spark plug designed to facilitate priming of the 'engine in cold weather, and one wherein the electrodes can be viewed without removing the plug from the engine, or without stopping the engine, when it is desired to know whether or not the plug is operating properly.

`Other objects and advantages of the invention will be better understood when the following` detailed description is read in connection with the accompanying drawing, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawing' forming part ofjthis application, likenumerals of reference indicate similar parts in the several views,v and wherein:

Figure 1 is a vertical sectional view through the plug constructed in accordance with the present invention.

Figure 2 is a sectional view taken on line 2-2 of Figure 1. v v

Figure 3 is an end elevation.

Figure 4vis an end elevation.

Figure 5 is an end elevation of one ofthe nuts arranged within the plug.

Figure 6 washer.'

Figure 7 is a plan view of the nipple.

Figure 8 is a view in elevation thereof partly broken away.

Figure 9 is a `vertical sectional view through a modified construction.

. The-spark plug forming the subject matter of the present invention is patterned after a pet cock of well known construction, and includes a tapered body portion 10 which is formed with depending hollow boss 11 into which is threaded the adjacent end of a nipple 12 as shown in Figure 1. This nipple is formed with a flange 13, preferably of the outline shown in Figure 7 and which engages the boss 11 when the nipple is properly associated with the latter. The nipple 12 is of course threaded for Vproper association with the spark plug opening of the engine with which' it is intended to be used.

is a perspective view of the Arranged within the body portion 10 of the` l plug -isa correspondingly tapered sleeve 14 which' is interiorly threaded adjacent the opposed ends thereof fory a purpose to vbe presently described. Threaded .into Vone end4 negates t of this sleeve isla nut 15 which is formed` with a longitudinal bore opening at both' ends to receive an electrode V16, the point of whichy projects 'beyond the inner end of the l llut inaXial alignment with the electrode 17 of the spark plugindicated generally at-18 in Figure `1. The part 18 is of course i'nsulation. This spark plug 18 isof the usual construction and is adapted to be receivedby a nut-19 threaded within the sleeve 14,'

and also passedlthrough an opening in the` nut 2O which also,r enters one end of the sleeve 1li as shown in Figure 1. The adjacent ends of the nuts 19 and 2O respectively are sl1ghtly dished or recessed to accommo-` date the packing 21, the packing beingar` ranged at opposite vsides -of the flanges 22 forming part of said plug, so that when the nut 2O is tightened, the plug 18 is held fixed adjusted toward and away from the electrode 17 providing a proper gap therebeai es.V

tween, and that one end of the electrode 16 .f I is squared as at 24; to permit the use of an v ordinary wrench for adjusting the electrode j as will be readily` understood. Aenut`15 is formed, with a flange 25, and after the nut has been associated with thepsleeve 14, this, j flange is used in conjunction lwith a resilient j s washer to hold the sleeve properly associated `r with the body portion 10 of the plug. This washer is preferably of the construction shown in Figurel 6 and indicated at`27 and wherein it will be noted that the washer vincludes a plurality of coils, from one of which entends a right'angularly disposed arm 28 which is provided with an opening 29l tol 'l receive the fasteningelement 30 which is' v. utilized to secure the washer in its ent1rety-; y ,a

fixed with relation to the body portion 10 of the plug. The operativearrangement of; I

this washeris shown in Figure 1, wherein it will be noted that the convolutions 27 are arranged between the; adjacent end of the body 10 and the flange 25 of the nut 15, these convolutions exerting a compressive force against the flange to draw the sleeve 14 in one-direction through the body portion 10 j kand hold -in -position for use. lW'hile the i sleeve is held stationary with relation to the body 10, While the plug,` is in use, through ythe instrumentality of the kvvasher just described, the sleeve 14 is'permitted rotation so: that it can be turnedvwithiny the body portion `tor a, purpose to be hereinafter described.` Theinut 15]is formedA With a squared portion 31 to'aoooininodate a suitable-Wrench .when it is desiredto turn the sleeve VWithin vthe 'body` portion. It desired,

' the' 'sleevejinay .be provided With an additional pointor electrode 32 `which projects inWardlyffromv the sleeve ataa right angle `to the :electrodes 16 Vand `17v respectively, and

j theyv occupy .position in 4align Withv the spaoexbetvveen .said-electrodes, or can vbe easilyfiiexed in either direction asindieated Y by dottedlines in `Figurell. 41t kWill be noted. l fronrthe :constructionishown and described, Lthats'thefelectrodesl and 1'? n are arranged' ,ahorizontal plane, Withthe electrodes 16 susceptibleaof quick,k adjustment to ,vary the space-Lbetween the"l electrodes as the occasion.

may require, and byfreason 'of the general censtructiomthis can be aceoinplished-.vvith- Y, outremoifingitheplugfrom theinotor, andv 1 1 also ivhilethe engine -is-in operation. Any

ofthe v,various .parts i can1 bev quickly removed t froinftlievbodyzot theplug to be cleanedy or `repaired;orreplaeed. .Thenagaiin if it `is desired-:to "look fat the plug ite determine Whether i or vnot' the llatter .is-,op`er'atin'g properly, fit is;v only ynecessary to turn the. .sleeve ltfivitliin the body :portion `10Y to `position -thevopening' otth'esleeve in align :with ,l the I openingt -in 'the-"body of-,the plug, l ufwhereuponitheuser can look'into the inte -rior-:of: the sleeve directly at Zthe electrodes l'16v-andi? respeeti'vely. lVhenfthe plug is in t use, the-sleeve y121 occupies the positionshovvn' iniFigure'Q, uvherein it ivvill be noted'tliat *sible'to'primethe engine Without reiut'ivingV thegplug and ris. accomplished by Simply i turningvthe-slee've 14 `Within thebody portion :'10 tobring the openings' and'e into registration with each other, Hwhereupon ,i gasoline lcan be poured into thesleeve, and J -the latter'subsequently',returnedpto its nor- `.malposition. The'inventionis very simple in. veonstrucztion yparticularly 'advanta- Vgeousfforthe:purpose.intended. `ltis to be understood thatsfthenipple 12 may beinterchanged ywith the nut 15, therebyehanging the plug toa vertical position by properly adjusting the electrode 16v With relation to 1the nut 1 5, and the. electrode 17 and that the body portion 19 may be rotated around the sleeve 14 for the purpose of cleaning and inspeetion of the electrodes 17 and 82.

lhile itis believed that from the foregoing description, the nature and advan tagesotI theinvent-ion 'will be readily apparent, l desire to-havetit understood that 'Ifdo not limit myself Lto what is hereinshovvn and described, and that such changes maybe resorted-to when desired as `'tall vvvithinthe scope of 'what is claimed. Y f

`Having thus described the invention,ifI claim: f f

`1. A spark plug'comprising albody portionl tapered vtoward one end Iand fhaving an opening in one side thereof, a tapered rsleevel arranged Within Lthe body'efor both` rotary and slidingfmovements, and havingan .openadapted to be moved into. :and .out fot' rregistration With the vopening'in saidbody,

an insulated A`member arranged centrally in said sleeve 'and supported atone endfthereot, an I electro de pro-j eeting` trom said insulating member, anadditional electrode supported in spacedrelation'totheiirstmentioned elec# trede, a nut -vthreadedinto pone 'end of. they sleeve, a flange formed on said nut,sand-a resilient Washer securedv to saidtbodyfportion and lincluding` ,a plurality l'of convolutions interposed between one end-,ot the body-.and ysaid flange oi the nut,y whereby endsthrust is exerted lupon the sleeve fer `holdingit `trietionilly in proper position ,Within the y2L Aspark plugeomprising a tapered body, a tapered sleeve arranged 'Within `the body tor both rotary and sliding:movements,

said sleeve and body-having openings-inv the vsides thereohnn insulated member arranged in one end ot the sleeveand supported'th'erei by, an f electrode projecting from said '.ineinbei', a pair ot' additional electrodes arranged adjacent the ,iirst -mentioned eleetrode, one oto-said additional electrodes beingadjustable with relation to the'eleetrode.carriedj kby'said insulated member, f a nut threaded into one end ot the rsleeve,1=aiflange earried `by said nut-.fand a resilientiwasher.secured to 'said body` portionand including),` aplufv rahty of cenvolutions interposed betweenthe" body portion andflange of saidl nut,\vhereby an end thrust is exerted upon the sleeve'for holding it inproper position by frie'tional Contact with the bodyportion.

11n testimony Whereoflatlix my signature.

j -LUTHER EELLETT. 

